Kefir

If youve been eating the standard American diet, you have an overgrowth of the gut bacteria that trigger cravings, and youll keep eating the same way, says Robynne Chutkan, M.D., author of Gutbliss. Fermented foods like kefir are naturally prebiotic, meaning they encourage the growth of good bacteria and help your body break down food more efficiently. Not a fan of the drinkable yogurt? Sauerkraut, kimchi, and pickled veggies work the same way.